Resource Allocation For OFDMA System Based On Game Theory

OFDMA has become the key transmission technologies for 4G mobile communication systems. Combining with adaptive technologies, frequency diversity and multiuser diversity can be effectively utilized to enhance the spectral efficiency of wireless communication systems. Game theory is a good mathematical tool for researching the competing behaviors and it has been widely used in wireless communication systems. Game theory can provide innovative research thought and algorithms to enhance the performance of wireless communication systems. Based on game theory, the main contribution of this master dissertation is to provide significant research results for resource allocation field, including innovative concepts, universal analytical thought and resource allocation algorithms.In the field of multi-cell resource allocation, we dedicate to the distributed resource allocation that there is no information exchange among multi-cells. The proposed distributed scheme is based on the non-cooperative game theory. Each cell updates the sub-carrier allocation and the power allocation, and the proposed algorithm converges to Nash Equilibrium through several iterations. In order to improve the performance of the distributed resource allocation scheme, we propose a semi-distributed resource allocation scheme. The base station controller is responsible for gathering the allocation information. There will be some information exchange among multi-cells. The system will have the further sub-carrier and power allocation process based on NE. Simulation results show that the proposed scheme can greatly enhance distributed scheme's spectral efficiency and normalized spectral efficiency. The proposed scheme can achieve different tradeoffs between system capacity and complexity by setting several adjustable parameters.